Inventor
David L. Richardson
Inventor
Arlington Heights, IL, US
Overview
Patents· 22 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G01Sprimary
G01SRadio direction-finding26%
C11DDetergent compositions10%
G01RMeasuring electric variables6%
H04LTransmission of digital information, e.g. telegraphic communication6%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests6%
Y10TTechnical subjects covered by former us classification6%
A21BBakers' ovens3%
A47JKitchen equipment3%
B23QDetails, components, or accessories for machine tools, e.g. arrangements for copying or controlling3%
B65DContainers for storage or transport of articles or materials, e.g. bags, barrels, bottles, boxes, cans, cartons, crates, drums, jars, tanks, hoppers, forwarding containers3%
PatentTitleYear
11,038,876Managing access to services based on fingerprint matching20216,882,274'Energy conserving satellite tracking tag'20056,791,489'Radio tag for LFM radar'20046,517,882'Food oven with even heat distribution'20036,329,944'Tag communication protocol & system'20016,313,620'Detector system for identifying the frequency of a received signal useful in a channelized receiver'20016,297,734'Randomization of transmit time'20016,246,729'Method and apparatus for decoding a phase encoded data signal'20016,138,554'Multi-layer griddle'20006,052,421'Method for separating a desired signal from an interfering signal'20005,861,837'Poly-frequency CW doppler radar system with leakage cancellation and method'19995,828,333'Multiple access diplex doppler radar'19985,714,947'Vehicle collision avoidance system'19985,574,360'Simultaneous signal detector'19965,530,451'Repeater with low spurious time outputs'19965,152,488'Microtranslator'1992D0320416'Gameboard'19914,529,534'Peroxyacid bleach compositions'19854,454,543'Dynamic video scrambling'19844,268,738'Microwave energy moderator'19814,115,292'Enzyme-containing detergent articles'19784,102,823'Low and non-phosphate detergent compositions'1978Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1978–1985Patents assigned to PROCTER & GAMBLE (4)· patent assignee history
1978–1985Based in Cincinnati, OH, US· patent location history
1984Patents assigned to OAK INDUSTRIES INC (1)· patent assignee history
1984–2005Based in Arlington Heights, IL, US· patent location history
1996–2005Patents assigned to NORTHROP GRUMMAN CORP (12)· patent assignee history
2000–2003Patents assigned to GAS RES INST (2)· patent assignee history
2000–2003Based in Lexington, MA, US· patent location history
2001Based in Arlington Hts., IL, US· patent location history
2021Patents assigned to LOOKOUT INC (1)· patent assignee history
2021Based in San Francisco, CA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| NORTHROP GRUMMAN CORP | 12 | 1996–2005 |
| PROCTER & GAMBLE | 4 | 1978–1985 |
| GAS RES INST | 2 | 2000–2003 |
| LOOKOUT INC | 1 | 2021 |
| OAK INDUSTRIES INC | 1 | 1984 |
Locations
| Location | Patents | Span |
|---|---|---|
| Arlington Heights, Illinois, US | 12 | 1984–2005 |
| Cincinnati, OH, US | 3 | 1978–1985 |
| Lexington, Massachusetts, US | 2 | 2000–2003 |
| San Francisco, California, US | 1 | 2021 |
| Arlington Hts., Illinois, US | 1 | 2001 |